Life on Earth

By larsess.skaviados

  • Late Heavy Bombardment

    Late Heavy Bombardment
    This 150-million-year event happened in which Earth was pummeled by debris

  • Abiotic synthesis

    Abiotic synthesis
    The space debris was able to make common organic molecules and create life; CHONPS + energy = life

  • Creation of unicellular life

    Creation of unicellular life
    Life on Earth consisted of single cells for billions of years

  • Prokaryotes

    Prokaryotes
    Single-cells began taking on specialized roles and working together in various arrangements

  • Endosymbiont Theory

    Endosymbiont Theory
    Two cells began to live together, exchanging some sort of substrate or metabolite

  • Mitochondria & plant chloroplasts

    Mitochondria & plant chloroplasts
    once free-living prokaryotic cells were swallowed up by a primitive host cell, but were not digested

  • Multicellularity

    Multicellularity
    Endosymbiosis led to the evolution of multicellular organisms

  • Protists and Evolution

    Protists and Evolution
    Multicellularity evolved in several different lineages probably by the specialization of the cells by colonial protists

  • Eukaryotes and kingdoms

    Eukaryotes and kingdoms
    Now eukaryotes contain a nucleus and are broken down into 4 kingdoms: Plantae, Fungi, Animalia, and Protista